print('lambda 表达式')


def one(x):
    return 2 * x + 1


print(one(5))

var = lambda x: 2 * x + 1

print(var(5))

arr = [1, 2, 4, 3, 9, 8, 6, 7, 0]

# x = [lambda a: a for a in arr]

for a in arr:
    print(a)

a = list(filter(lambda x: x % 2, range(20)))

print(a)